diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index 77fae5f64f2e0741ff6900135f9337cfac6093b0..ef0fafcbfbcb9364d2d3de442152fac8a878ef4c 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -1822,6 +1822,8 @@ static int __init ppc4xx_pci_find_bridges(void)
 {
 	struct device_node *np;
 
+	ppc_pci_flags |= PPC_PCI_ENABLE_PROC_DOMAINS | PPC_PCI_COMPAT_DOMAIN_0;
+
 #ifdef CONFIG_PPC4xx_PCI_EXPRESS
 	for_each_compatible_node(np, NULL, "ibm,plb-pciex")
 		ppc4xx_probe_pciex_bridge(np);